I've got it taken care of now. Since they've been doing it consistently for a week, it's not something I can attribute to an accident or a glitch in the editor. We'll see if being blocked for a month is enough to deter them.
The fact that you recognize what you did before wasn't good is a positive sign you've learned from the experience. Too many people don't.
Check out your Admin Dashboard, which can be found by clicking "Admin" on the bottom toolbar. It has links to all your new tools. Please let me know if you have any questions, and good luck with the wiki!